Statement-1: Micelles are formed by surfactant molecules above the critical micellar concentration (

Question

Statement-1: Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). 
Statement-2: The conductivity of a solution having surfactant molecules decreases sharply at the CMC.

Professor PC Thomas Classes · Answer

Both statements are true. Micelles form above CMC. Formation of bulky micelles reduces ionic mobility, decreasing conductivity, but the drop in conductivity is an effect, not the cause.